Oxford Dictionary English petty officer nounnoun BrE BrE//ˌpeti ˈɒfɪsə(r)// ; NAmE NAmE//ˌpeti ˈɔːfɪsər// , NAmE//ˌpeti ˈɑːfɪsər// (abbreviation PO) The navy Add to my wordlistjump to other results a sailor of middle rank in the navy See related entries: The navySee petty officer in the Oxford Advanced American DictionaryCheck pronunciation: petty officer oxfordlearnersdictionaries.com
